UI in device pixels on the character grid with fixed integer font sizes, ASCII bars; 3D render scale for a pixel look

- text only at 1x/2x/4x times an integer interface factor (auto or 1-4 in the settings)
- high DPI rendering, own 2D camera in device pixels, mouse converted
- toolbar buttons 6 columns, integer icon scale, minimap integer pixels per tile
- all bars (top bar, unit/tower/gate HP) as CP437 block characters
- 3D world optionally rendered at 1/2, 1/3, 1/4 and upscaled with nearest filtering

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

src/main.rs

@@ -36,7 +36,7 @@ fn conf() -> macroquad::conf::Conf {
             window_title: "DungeonCraft".into(),
             window_width: 1280,
             window_height: 800,
-            high_dpi: false,
+            high_dpi: true,
             ..Default::default()
         },
         draw_call_vertex_capacity: 40000,
@@ -67,10 +67,11 @@ fn next_seed(seed: u32) -> u32 {
 
 fn apply_settings(s: &Settings, r3d: &mut R3d) {
     i18n::set_language(&s.language);
-    ui::set_ui_scale(s.ui_scale as f32);
+    ui::set_ui_factor(s.ui_factor);
     r3d.outlines = s.outlines;
     r3d.set_wall_detail(s.wall_subdivisions());
     r3d.max_lights = s.max_lights as usize;
+    r3d.render_div = s.render_scale.clamp(1, 4) as u32;
     audio::set_volumes(s.music_volume, s.volume, s.muted);
 }
 
@@ -238,7 +239,8 @@ async fn main() {
     loop {
         let dt = get_frame_time().min(0.1);
         let now = get_time();
-        let (mx, my) = mouse_position();
+        let (mx, my) = mouse_position(); // CSS pixels (3D picking)
+        let (ux, uy) = ui::mouse(); // device pixels (interface)
         let mut settings_changed = false;
 
         // ---------------- savegame files: file picker result or dropped onto the window
@@ -272,7 +274,7 @@ async fn main() {
         let dialog = ui.show_langsel || ui.show_help;
         let in_menu = menu.open();
         let playing = !in_menu && !dialog;
-        let over_ui = ui.over_ui(mx, my);
+        let over_ui = ui.over_ui(ux, uy);
         let picked = app.cam.pick_tile(&app.game.map, mx, my);
         let hover_tile = picked.map(|(x, z, _)| (x, z));
         let ground = app.cam.ground_point(mx, my);
@@ -436,7 +438,7 @@ async fn main() {
         // ---------------- left button
         if is_mouse_button_pressed(MouseButton::Left) {
             if dialog {
-                match ui.click(mx, my, &app.game) {
+                match ui.click(ux, uy, &app.game) {
                     UiAction::SelectLanguage(code) => {
                         app.settings.language = code;
                         settings_changed = true;
@@ -446,7 +448,7 @@ async fn main() {
                     _ => {}
                 }
             } else if in_menu {
-                match menu.click(mx, my, &mut app.settings) {
+                match menu.click(ux, uy, &mut app.settings) {
                     MenuAction::SettingsChanged => settings_changed = true,
                     MenuAction::Resume => {}
                     MenuAction::NewGame => {
@@ -483,7 +485,7 @@ async fn main() {
                     MenuAction::None | MenuAction::Consumed => {}
                 }
             } else {
-                match ui.click(mx, my, &app.game) {
+                match ui.click(ux, uy, &app.game) {
                     UiAction::SelectTool(t) => {
                         ui.tool = t;
                         app.game.sfx_ui(game::Sfx::Click);
@@ -520,8 +522,8 @@ async fn main() {
             }
         }
         if inp.minimap_drag {
-            if is_mouse_button_down(MouseButton::Left) && ui.minimap_contains(mx, my) {
-                let (x, y) = ui.minimap_world(mx, my);
+            if is_mouse_button_down(MouseButton::Left) && ui.minimap_contains(ux, uy) {
+                let (x, y) = ui.minimap_world(ux, uy);
                 app.cam.tx = x;
                 app.cam.tz = y;
             } else if !is_mouse_button_down(MouseButton::Left) {
@@ -591,8 +593,9 @@ async fn main() {
 #[allow(clippy::too_many_arguments)]
 fn draw_frame(app: &mut App, gfx: &Gfx, r3d: &mut R3d, ui: &mut Ui, menu: &mut Menu, inp: &Input, now: f64) {
     let (mx, my) = mouse_position();
+    let (ux, uy) = ui::mouse();
     let blocked = menu.open() || ui.show_help || ui.show_langsel;
-    let over_ui = blocked || ui.over_ui(mx, my);
+    let over_ui = blocked || ui.over_ui(ux, uy);
     let hover_tile = app.cam.pick_tile(&app.game.map, mx, my).map(|(x, z, _)| (x, z));
     let ground = app.cam.ground_point(mx, my);
     clear_background(Color::from_rgba(4, 3, 5, 255));